Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: Njmasa &lt;jon.masamitsu@oracle.com&gt;, stefank &lt;stefan.karlsson@oracle.com&gt;, mgerdin &lt;mikael.gerdin@oracle.com&gt;, never <tom.rodriguez@oracle.com>

Summary: Added capability to load support classes for other cpus
Reviewed-by: coleenp, bobv, sla
Contributed-by: NBill Pittore <bill.pittore@oracle.com>

Summary: Do not remove safepoints during peeling optimization.
Reviewed-by: twisti

7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
Reviewed-by: kvn

Summary: Add the flags G1EvacuationFailureALot flag (and supporting flags) to force trigger evacuation failures. The support flags control how often to trigger an evacuation failure and during which types of evacuation pause. This functionality is analogous to that of PromotionFailureALot for the other collectors.
Reviewed-by: brutisso

Reviewed-by: kvn, dholmes, coleenp
Contributed-by: NTao Mao <tao.mao@oracle.com>

Summary: Add split_arena to allocate temporary arrays in PhaseChaitin::Split() and free them on method's exit.
Reviewed-by: twisti

Summary: Change pair check to vector check in RA bias coloring code.
Reviewed-by: jrose, twisti

7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
Summary: Also reviewed by vitalyd@gmail.com. Introduced the WorkerDataArray class. Fixed some minor logging bugs.
Reviewed-by: johnc, mgerdin

Summary: Also reviewed by: vitalyd@gmail.com. Make G1DefaultMinNewGenPercent, G1DefaultMaxNewGenPercent, G1OldCSetRegionLiveThresholdPercent and G1OldCSetRegionThresholdPercent experimental flags
Reviewed-by: ysr, johnc, jmasa

Summary: Fixed Pack node generation. Not vectorize shift instructions if count is not the same for all shifts and if count is vector.
Reviewed-by: twisti

Summary: C1 value numbering hits unloaded klass.
Reviewed-by: kvn, twisti

Summary: Shifts with loop variant counts "a[i]=1<<b[i];" should not be vectorized since hw does not support it.
Reviewed-by: twisti

Summary: Correct the result value of G1CollectedHeap::pending_card_num(). Change the code that calculates the GC efficiency of a non-young heap region to use historical data from mixed GCs and the actual number of live bytes when predicting how long it would take to collect the region. Changes were also reviewed by Thomas Schatzl.
Reviewed-by: azeemj, brutisso

Reviewed-by: kvn, roland, jrose

Summary: G1 does not appear to be immune to the issue described in CR 6948537 and increasing the size of old-generation PLABs appears to increase the liklihood of seeing the issue. Extend the fix for 6948537 to G1's BlockOffsetTable.
Reviewed-by: brutisso, jmasa

Summary: In C2 add software membar after load from Reference.referent field to prevent commoning of loads across safepoint since GC can change its value. In C1 always generate Reference.get() intrinsic.
Reviewed-by: roland, twisti, dholmes, johnc

Summary: Added asm encoding and mach nodes for vector arithmetic instructions on x86.
Reviewed-by: roland

7191124: Optimized build is broken due to inconsistent use of DEBUG_ONLY and NOT_PRODUCT macros in NMT
Summary: Updated all related variables and methods to use NOT_PRODUCT macros
Reviewed-by: coleenp, acorn, kvn

Reviewed-by: kvn, jrose

Summary: Provide additional detail in VerifyError messages
Reviewed-by: sspitsyn, acorn

Summary: Employ PLABStats instances to record information about survivor and old PLABs, and use the recorded stats to adjust the sizes of survivor and old PLABS.
Reviewed-by: johnc, ysr
Contributed-by: NBrandon Mitchell <brandon@twitter.com>

Reviewed-by: kvn, jrose

7187429: NMT ON: Merge failure should cause NMT to shutdown
Summary: Fixed NMT assertion failures
Reviewed-by: acorn, kvn

Summary: Templates need this object if not using template parameter in call
Reviewed-by: coleenp, kamg, dholmes

Summary: Added new FormatBufferResource class to use thread's resource area for error message buffer.
Reviewed-by: twisti

Summary: Implementation of decoder for Apple's MacOSX. The implementation is based on the patch provided by Kevin Walls.
Reviewed-by: coleenp, kamg, kevinw

Reviewed-by: kvn, twisti

6984705: JSR 292 method handle creation should not go through JNI
Summary: remove assembly code for JDK 7 chained method handles
Reviewed-by: jrose, twisti, kvn, mhaupt
Contributed-by: NJohn Rose &lt;john.r.rose@oracle.com&gt;, Christian Thalinger &lt;christian.thalinger@oracle.com&gt;, Michael Haupt <michael.haupt@oracle.com>

Summary: Various cleanups as a prelude to introducing iterators for HeapRegions.
Reviewed-by: johnc, brutisso

Summary: 1) Fixed MemTrackWorker::generations_in_used() calculation 2) Ensured NMT not to leak memory recorders after shutdown 3) Used ThreadCritical to block safepoint safe threads
Reviewed-by: acorn, coleenp, dholmes, kvn

Summary: Chain the fine grain PerRegionTables in an individual RSet together and free them in bulk using a single operation.
Reviewed-by: johnc, brutisso
Contributed-by: NThomas Schatzl <thomas.schatzl@jku.at>

Summary: Assertion incorrectly checks that _head is NULL and should be checking that _tail is NULL instead.
Reviewed-by: johnc
Contributed-by: NBrandon Mitchell <brandon@twitter.com>

Summary: Duplicated code from G1RemSet::par_write_ref() inlined into G1UpdateRSOrPushRefOopClosure::do_oop_nv() was showing up in profiles with a fairly high amount of CPU time. Manually inline the main part of G1RemSet::par_write_ref() to eliminate the code duplication.
Reviewed-by: azeemj, brutisso

Summary: renamed mach nodes which use scalar AVX instructions, added integer vectors shuffling instructions
Reviewed-by: twisti

Summary: replace recursive method with iterative
Reviewed-by: kvn, twisti
Contributed-by: dean.long@oracle.com

Reviewed-by: kvn, never

Summary: Changed _query_lock to heap object from static object. Also fixed _query_lock and snapshot lock ranks, so they can participate deadlock detection.
Reviewed-by: coleenp, dholmes, kvn

Summary: Assertion on stack base is not necessary
Reviewed-by: coleenp, dholmes, kvn

Summary: Don't eliminate Integer::toString() call node during String concatenation optimization if it has several uses.
Reviewed-by: twisti